G-CoCr28 Cobalt vs. Grade 300 Maraging Steel

G-CoCr28 cobalt belongs to the cobalt alloys classification, while grade 300 maraging steel belongs to the iron alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is G-CoCr28 cobalt and the bottom bar is grade 300 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		190

Elongation at Break, %		6.7
Elongation at Break, %		6.5 to 18

Poisson's Ratio		0.28
Poisson's Ratio		0.3

Shear Modulus, GPa		83
Shear Modulus, GPa		75

Tensile Strength: Ultimate (UTS), MPa		560
Tensile Strength: Ultimate (UTS), MPa		1030 to 2030

Tensile Strength: Yield (Proof), MPa		260
Tensile Strength: Yield (Proof), MPa		760 to 1990

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		270

Melting Completion (Liquidus), °C		1330
Melting Completion (Liquidus), °C		1480

Melting Onset (Solidus), °C		1270
Melting Onset (Solidus), °C		1430

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		450

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		12

Otherwise Unclassified Properties

Base Metal Price, % relative		100
Base Metal Price, % relative		34

Density, g/cm³		8.1
Density, g/cm³		8.2

Embodied Carbon, kg CO₂/kg material		6.2
Embodied Carbon, kg CO₂/kg material		5.1

Embodied Energy, MJ/kg		84
Embodied Energy, MJ/kg		68

Embodied Water, L/kg		440
Embodied Water, L/kg		150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		31
Resilience: Ultimate (Unit Rupture Work), MJ/m³		130 to 170

Stiffness to Weight: Axial, points		15
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		19
Strength to Weight: Axial, points		35 to 68

Strength to Weight: Bending, points		19
Strength to Weight: Bending, points		28 to 43

Thermal Shock Resistance, points		14
Thermal Shock Resistance, points		31 to 62

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0.050 to 0.15

Boron (B), %		0
Boron (B), %		0 to 0.0030

Calcium (Ca), %		0
Calcium (Ca), %		0 to 0.050

Carbon (C), %		0.050 to 0.25
Carbon (C), %		0 to 0.030

Chromium (Cr), %		27 to 30
Chromium (Cr), %		0

Cobalt (Co), %		48 to 52
Cobalt (Co), %		8.5 to 9.5

Iron (Fe), %		9.7 to 24.5
Iron (Fe), %		65 to 68.4

Manganese (Mn), %		0 to 1.5
Manganese (Mn), %		0 to 0.1

Molybdenum (Mo), %		0 to 0.5
Molybdenum (Mo), %		4.6 to 5.2

Nickel (Ni), %		0 to 4.0
Nickel (Ni), %		18 to 19

Niobium (Nb), %		0 to 0.5
Niobium (Nb), %		0

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.010

Silicon (Si), %		0.5 to 1.5
Silicon (Si), %		0 to 0.1

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.010

Titanium (Ti), %		0
Titanium (Ti), %		0.5 to 0.8

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.020